Hi Anton, Unfortunately, I never did find a good solution to this problem. The best solution I found was to create multiple models and simulate them independently. It's possible that a better solution exists in the more recent iterations of OpenSim. I ended up moving to an alternative simulation pla...

Hi James, Thanks for the reply. This was ultimately the setup that I settled on. Currently, I have proximal and distal bodies (foot1 and foot2, respectively) connected via a PinJoint. I've added an intermediate massless body (fulcrum) that translates in the foot1 frame via a FreeJoint. However, I'm ...

Hello, I am working on a project in which I am attempting to model variable joint stiffness through variable joint location (i.e. moving the axis of rotation relative to the point of force application). Currently, I have proximal and distal bodies connected by a custom joint with a CoordinateLimitFo...

Thanks for the reply, James. Yes, I do have GRFs for my gait data. For the reasons that you mention above, accounting for foam stiffness is not an issue with those data. However, I am hoping to perform some simulations in the absence of GRFs. Is FEA my best bet for this?

Thanks!

Hello,

I am working on a project that requires me to account for the stiffness of foam in footwear.

Is it possible to model foam with a known stiffness in OpenSim 4.0? Does anybody have suggestions for methods to accomplish this?

Thank you!

I am currently working to validate a model of a two-segment prosthetic foot. The joint between the forefoot and midfoot of the prosthesis has a known stiffness value which I have modeled as a BushingForce. I would like to "tune" and ultimately validate the stiffness of the modeled joint to the known...